Sectional boiler



2 Sheets-Sheet 1.

(No Model.)

J. BOND. SEGTIONAL BOILER.

Patented July 30, 1889. v

Fig.2.

Fig.1

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I il/M Attorney.

I PETERS. Pholc-Lillwgmpher. Waihingwm D1 C.

(No Model.)

2 Sheets-Sheet 2.

J. BOND. SEOTIONAL BOILER.

No. 407,920. Patented July 30, 1889.

Witnesses.

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UNITED STATES PATENT DFFICE.

. JOSEPH BOND, or BUFFALO, NEW YORK.

SECTIONA-L BOILER.

SPECIFICATION forming part of Letters Patent No. 407,920, dated July 30,1889.

Application filed August 27, 1888. Serial No. 283,932. (No model.)

To all whom it may concern.-

Be it known that I, JOSEPH BOND, a citizen of the United States,residing in Buffalo, in the county of Erie and State of New York, haveinvented certain new and useful Improvements in Sectional Boilers, ofwhich the following is a specification.

My invention relates to certain new and nseful improvements in sectionalboilers; and it consists of a series of sections which,when securedtogether, form a spiral smoke-flue havlng an intermediate spiral waterway or chamber, whereby an unobstructed spiral flueis provided for theproducts of combustion and a spiral ,passage-way within or between thespiral surfaces of the smoke-flue for the water to circulate through,all of which will be fully and clearly hereinafter described andclaimed, reference being had to the accompanying drawings, in which--Figure 1 is a vertical section through line t'j, Fig. 3. Fig. 2 is avertical cross-section on or about lines 6 f and g h, Figs. 1 and 3.Fig.3 is a top plan view. Fig. 4 is a horizontal section in or aboutlines CL 1) and 0 cl, Figs. 1 and 2. Fig. 5 is a perspective view of asingle section having the spiral water-passage and showing one-half of aportion of the spiral smoke-flue. Fig. 6 is a section through line 7t Z,Fig. 5.

By reference to Fig. 5 it will be seen that the sections 1, forming thespiral passages, are each provided with an inclined spiral depression,commencing at the top at 2 and curving in an inclined direction towardthe point 3, leaving an opening 4. This spiral depression forms one halfof thesmoke-flne; the other half is formed by the next section whenplaced above it. On the opposite half of the section is a similardepression placed parallel with the depression 2 3. These spiraldepressions are each formed of metal of sufficient thickness to standthe required pressure, and are separated far enough apart from eachother (for instance) from the point 2 to the point 5 to leave therequired room between them for a spiral water passage (3. Extending fromeach side or from one side of each casing is a smaller water-cha1nbercase 7, projecting out from the main chamber and of less height than thesection. It is provided with a diaphragm 8, running diagonally acrossit. (See Figs. 1, 2, and 4.) These extension portions and smoke-fines.

7 are made so as to extend only partly down the side of the section, soas to leave room enough to insert a screw-threaded tubular nipple 9, forproducing a water-tight connection between the sections, as shown inFig. 1.

The object of the projecting water-chamber portions 7 is to provide themeans for a circulation of the water from one section up to or intoanother section; and the object of the diaphragms S is to compel thewater as it enters the extension-chamber 7 at the lower side of thediaphragm to pass entirely around the section until it reaches theopposite side of the diaphragm before it passes up through thetubular-nipple connection into the section above it, when it makesanother similar circuit in that section, and so on through as manysections as may be connected together.

The tubular nipples 9 are adapted to screw into holes 11 in thesections. (See Fig. 4.)

The base 12 of the boiler is provided with the ordinary ash-pit 13 and adoor 14.

The grate 15 is made in the usual way. 16 represents the first fire-boxsection. It is provided with an annular surrounding waterchamber, anextension-chamber case 7, a diaphragm S, and a screw-threaded tubularnipple having right-and-left-hand screws for connecting with the nextfire-box section 17. This section 17 is also provided with a surrounding-water-chamber, an exten sion-chamher case 7, a diaphragm 8, and asimilar tubular screw-threaded nipple 9, for connecting it with thesection above it, and a door 17, opening into the fire-chamber. Thesefirebox sections inclose the combustion-chamber 18; but more of suchsections maybe used, according to the size of the combustion-chamber.There may also be more or less of the sections containing thespiralwater-chambers The upper periphery of each section is provided with anupwardlyprojecting flange 19, into which the lower edge of the sectionabove is fitted. The rear portions of the sections are held together,and a water-tight joint is made by the screwthreaded tubular nipples 9,and the fore part of the sections are secured by lugs and bolts 20, orother equivalent means.

If desired, there may be more or less than the number of lugs and boltsshown, or they may be dispensed with and a series of two or morescrew-threadedtubular nipples 9 and extension portions 7 'used' in lieuthereof for securing the sections together. In place of thescrew-threaded tubular nipples 9, an ordinary smooth nipple may be usedand the whole forced together in the ordinary-way; or, instead of thenipples, any kind of wellknown packed joint may be employed.

The top section 21 is provided with a larger area of water-chamber 22,also with a rear eX- tension-chamber 7, having a diaphragm 8 and a screwthreaded nipple connection. It is also provided with the outlet for thespiral smoke-flue 23, and with a collar 24, to receive the smoke-pipe.(See Figs. 1 and 2.) By this construction a continuous upward course ina spiral direction is provided for the products of combustion, avoidingsharp turns and the hinderance to a natural draft incident to boilershaving up-and-down dues or i'lues having sharp quick turns. It alsoprovides a much longer continuous passage for the products ofcombustion, which are thereby retained for a proportionately-longer timein contact with the surface to be heated, so as to impart a largeramount of heat in proportion to the fuel used to the water which passesbetween the surfaces of the spiral smokeflues.

It will be noticed that the smoke-flue is surrounded 011 all sides withwater, whereby I secure a greater economy in the consump tion of fueland make the boiler complete in itself, so that it can be used withoutthe necessity of surrounding it with brick-work or other covering. Itherefore avoid considerable expense and inconvenience in setting it up,and also render the boiler more easy of access and in portable form, sothat it may be transported from place to place.

I am aware that boilers have heretofore been made having a portion ofthe sides of the smoke-flue composed of the brick-work surrounding theboiler; but such construction is objectionable, for the reason thatimperfections in the brick-work or cracks resulting from settling orother causes often permit the escape of gas and smoke, which is aserious objection. By my construction I avoid all of these objectionsand also obtain a large increase of water-surface.

The threaded nipples for securing the extension portions of the sectionstogether afford the means for producing a simple and cheap water-tightconnection for the waterjoints, and the sections being alike as re gardsthe fitting of each together, one or more can be added or replaced atany time, and as the sections above the fire-box are duplicates anynumber may be added or taken from the boiler to change its capacity, ifdesired; or a boiler of any desired size can be easily made up from thesections, depending upon the number used, all being interchangeable. Theboileris self-contained, requiring no brickwork or casing of any kind tomake it complete, and consequently it is portable ancleasily moved aboutor removed when required. The inlet-openings 25 may be placed at anyconveniently-arranged point at the lower part of the boiler, (see Fig.1,) and the outlet-openin gs 26 may be placed at anyconvenient point atthe top of the boiler. (See Fig. 3.

27 represents what may be called a cleanout door. Its object is to allowaccess to the smoke-flue to clean it out. I have shown but one; butthere may be as many more as may be required to enable the operator toreach the different parts.

I claim as my invention- 1. A sectional boiler provided with aspiralsmoke-flue surrounded on all sides by water for conducting the productsof combustion from the fire-chamber to the outlet spirally up throughthe water within the boiler, substantially as described.

2. In a boiler composed of sections each having a spiral water-passage,the combination therewith of extension port-ions connected byscrew-threaded nipples for connecting the spiral passage of eachsection, thereby forming a spiral passage in a continuous forward andupward direction around the boiler from the inlet to the outlet,substantially as described.

3. A sectional boiler provided with a spiral smoke-flue for conductingthe products of combustion from the fire-chamber up through or aroundthe boiler, in combination with a spiral water-passagefor conducting thewater between or around the heating-surfaces from the inlet to theoutlet of the boiler, substantially as described.

4. In a sectional boiler, a series of sections, duplicates of eachother, above the fire-chainber, forming a spiral smoke-flue within theboiler, in combination with a spiral waterway surrounding the smoke-flueon all sides, except the inlet and outlet,substantially as described.

5. In asectional boiler, a boiler-section having a spiral recess on eachside forming a portion of a spiral smoke-fiue and an intermediate spiralwater way or passage, in combination with an extension-chamber providedwitha diaphragm interposed between the inlet and outlet openings toprevent the water from reaching the outlet until after it has made acircuit around the section. substantially as described.

6. In a sectional boiler, a series of sections having an annularwater-chamber an d extension water chambers provided with diaphragms forcausing a circulation of the water, a base portion carrying the grate,and screwthreaded tubular nipples for producing a water-tight joint andsecuring them together, the whole forming the combustion-chamber, incombination with a series of sections each having a spiral orhalf-spiral smoke-flue on IIO opposite sides, and an intermediate spirala combined spiral smoke-flue and Water-way Water-chamber communicatingWith an exis provided, substantially as and for the pur- [0 tensionWater-chamber having a diaphragm posesclesoribed.

for causing the Water when it enters the seo- 5 tion to pass around itbefore it passes through JOSEPH B the outlet, screw-threaded tubularnipples 'for WVitnesses:

securing the extension water-sections, and JAMES SANGSTER,

bolts for securing the main sections, whereby ARTHUR J. SANGSTER.

